> sorry, I said I was going to quit.
> But I really am learning from this exchange, so if you
> don't mind,
> one more question.
>
> Once there's an arc going, opening the circuit on the
> grid-to-ground
> side would have the same effect as opening the circuit on
> the
> HV-to-plate side... no?
No Chris.
If you open the grid path, the anode now dumps energy to the
cathode via the grid. This isn't a guess, wild speculation,
or something that happens once in a while. This is something
that often happens!
If the anode path is opened, everything goes away provided
the protection device in the anode lead has enough hold-off
rating to quench the opening arc.
There is a world of difference between the fusing or fault
protecting an anode or fusing a grid. Fusing a grid for
faults is about as wise as fusing the neutral of a power
line.
73 Tom
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